import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate from '../components/goods/Cate.vue'
import Params from '../components/goods/Params.vue'
import List from '../components/goods/List.vue'
import Add from '../components/goods/Add.vue'
import Order from '../components/order/Order.vue'
import Report from '../components/report/Report.vue'

Vue.use(VueRouter)

const router = new VueRouter({
  routes:[
    { path:'/', redirect:'/login'},
    { path:'/login', component:Login },
    { 
      path:'/home', 
      component:Home,
      redirect:'/welcome',
      children:[
        { path:'/welcome',component:Welcome },
        { path:'/users',component:Users },
        { path:'/rights',component:Rights },
        { path:'/roles',component:Roles },
        { path:'/categories',component:Cate },
        { path:'/params',component:Params },
        { path:'/goods',component:List },
        { path:'/goods/add',component:Add },
        { path:'/orders' ,component:Order },
        { path:'/reports' ,component:Report }
      ] 
    }
  ]
})

//挂载路由导航守卫
router.beforeEach( (to,from,next) => {
  //to 将要访问哪个路径
  //from 从哪个路径跳转而来
  //next 是一个函数，表示放行
  //next() 放行 ，  next('/login') 强制跳转
  if(to.path === '/login') return next();
  //获取token
  const tokenStr = window.sessionStorage.getItem('token');
  if(!tokenStr) return next('/login');
  next();
})

export default router;
